12345123533 has 2 divisors, whose sum is σ = 12345123534. Its totient is φ = 12345123532.

The previous prime is 12345123503. The next prime is 12345123551. The reversal of 12345123533 is 33532154321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11857685449 + 487438084 = 108893^2 + 22078^2 .

It is a cyclic number.

It is not a de Polignac number, because 12345123533 - 2⁸ = 12345123277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12345123533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12345123503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172561766 + 6172561767.

It is an arithmetic number, because the mean of its divisors is an integer number (6172561767).

Almost surely, 2^12345123533 is an apocalyptic number.

It is an amenable number.

12345123533 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345123533 is an equidigital number, since it uses as much as digits as its factorization.

12345123533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 32.

Adding to 12345123533 its reverse (33532154321), we get a palindrome (45877277854).

The spelling of 12345123533 in words is "twelve billion, three hundred forty-five million, one hundred twenty-three thousand, five hundred thirty-three".